Campaigners last night questioned why he wasn’t caged after his murder trial heard he was a heroin addict who had split from his lover — factors known to raise risk levels.

Margaret-Ann Cummings, whose son Mark, eight, was killed by paedo Stuart Leggate in Glasgow in 2004, said: “It’s heartbreaking that two more families are going through what we are and makes me so angry because it was avoidable.